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 Painting and varnishing for beginners

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Stewpot
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PostSubject: Painting and varnishing for beginners    Painting and varnishing for beginners  EmptyMon Feb 10, 2020 9:49 pm

Aeronaut Classic 
Having read too many posts on painting and varnishing, I think I may have a plan:
Sand and seal everything once, rubdown.
Below the waterline: prime, paint and rubdown x lots
Above the waterline: varnish and rubdown x lots

I will rubdown between coats of paint and varnish as many times as needed to get a good finish.

My main concern is : Can I use acrylic paint/varnish or should it be polyurethane based paint/varnish?
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Roadrunner
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PostSubject: Re: Painting and varnishing for beginners    Painting and varnishing for beginners  EmptyTue Feb 11, 2020 12:07 pm

Sanding sealer will make the paint stretch and crack “crazy” look after a short time as it don’t “seal” the wood the way people think, Sanding sealer only locks down the strands of the surface for a better surface sand prior to being oiled, sanding sealer as a surface sealer just doesn’t work at actually “sealing” as it’s penetration is pretty low especially with hardwoods, the crazy paint on a sanding sealed surface is due to the wood still being able to move.

This is a common fact so please don’t make the mistake!

For a wooden boat you should seal the wood with lacquer 2 coats at least( rub down between coats) then primer, etch filler or standard car primers work fine,  colour then lacquer again for finish coat, lacquer can also be used as a varnish for the deck.

On all my wooden boats I use an epoxy varnish to seal and use as a finish coat but it’s not cheap £50 + other parts per 1L) and not for the faint hearted, ( requires a working term of 22 degrees and smells so bad and is very messy to clean up if u mess up) but lacquer works equally well but will require up to 12 coats to get the deck polished up perfectly.

As for paint once the surface is sealed and primed as instructed, you can use acrylic colours, airbrushes or rattle can once fully dry then lacquer to finish.

Do not use acrylic lacquer over a oil based paint colour like enamels it’s simply will crazy or orange peel, stick to car paints and you should be fine.

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Roadrunner
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PostSubject: Re: Painting and varnishing for beginners    Painting and varnishing for beginners  EmptyTue Feb 11, 2020 12:14 pm

On a side note check out my airbrush post in the paint section as that has some detailed instructions on acrylic paint and finishes, and also check out my sea urchin build in the vintage boat section that’s a full page worth of what and what not to do, problems and fixes I had to go through with that boat with photos of each stage, ignoring the epoxy finish

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stavros
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PostSubject: Re: Painting and varnishing for beginners    Painting and varnishing for beginners  EmptyTue Feb 11, 2020 10:27 pm

DEFO use some good old Halfords car lacquer to seal the wood....2 light coats leave to dry quick light rubdown with 180 grit DRY do NOT use water.......another 2 coats and rub down the same another 2 coats 400grit DRY...another 2 coats 800Grit DRY another 2 coats 1000grit WET another 2 coats 1500 WET another 2 coats and 2000WET,obviously more if needed and you should have a lovelley glossy woodwork.....and no need for varnish at all....obviously for anywhere that is getting painted gloss omit the 800/1000/1500

Dave
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Stewpot
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PostSubject: Big thanks   Painting and varnishing for beginners  EmptyFri Feb 14, 2020 10:10 am

Thanks for your straightforward and clear advice. It is much appreciated. I only hope my finished boat lives up to your expectations.
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